Sharp DV-NC60H (serv.man12) Service Manual ▷ View online
48
DV-NC55S/H
DV-NC60H
DV-NC60H
FLOW CHART NO.8
Is the voltage more than about 2.6V DC given out
of pin(59) of IC701.
Check IC701.
Is the supply voltage of 5V feed to pin(8) of AC
connector?
Check PC 5V line.
Is the voltage more than 2.6V DC sent in pin(4) of
AC connector?
Check between the pin(4) of AC connector and all
the way up thru to pin(59) of IC701.
Replace capstan motor.
NO
NO
NO
YES
YES
YES
Is approx. 3.5V applied to the pin(3) of the AC
connector?
Check the pin(60) of IC701.
NO
YES
Is 23V applied to the pin(5) of the AC connector
normally?
Check AT 23V line.
NO
YES
The capstan motor fails to run.
FLOW CHART NO.7
Does power control(H) signal at pin(94) of IC701
change from "L" to "H" level?
Check IC701.
Does the base voltage of RJ9904 change from
about 12.6V to 11.8V?
Check line between RJ9904, Q9905 and IC701.
Is voltage of 12V sent out from the emitter of
RJ9904 transistor?
Check peripheral circuit of RJ9904 and AT 12V line.
NO
NO
NO
YES
YES
Does the base voltage of Q9903 change from
about 5.5V to 6.2V?
Check line between emitter of RJ9904 and base of
Q9903.
NO
YES
Is voltage of 5V sent out from the emitter of Q9903
transistor?
Check peripheral circuit of Q9903 and AT 5V line.
NO
YES
Check peripheral circuit for poor soldering.
YES
No power is turned on.
FLOW CHART NO.9
Is the voltage more than about 2.6V DC given out
of pin(58) of IC701.
Check IC1701.
Is the supply voltage of 5V feed to pin(3) of IC7002?
Check PC 5V line.
Is the voltage more than about 2.6V applied at
pin(2) of IC7002?
Check between pin(58) of IC701 and all the way
up to pin(2) of IC7002.
NO
NO
NO
YES
YES
Is the supply voltage of 12V feed to pin(21) of IC7002?
Check PC 12V line.
NO
YES
Check or replace drum motor.
YES
The drum motor fails to run.
FLOW CHART NO.10
Is drum PG signal given out of pin(7) of IC7002?
Check pins(4), (5), (6) of IC7002 and periperal circuits.
Check or replace drum motor.
Is drum PG signal given out of pin(66) of IC701?
Check line between pin(7) of IC7002 and all the
way up thru to pin(66) of IC701.
Is V-H.SW.P pulse given out of pin(23) of IC701?
Check IC701.
NO
NO
NO
YES
YES
YES
Replace IC701.
YES
The drum motor runs only for a few seconds.
FLOW CHART NO.11
Is the drum motor rotating?
See FLOW CHART NO.9, 10
<The drum motor fails to run>
<The drum motor runs only for a few seconds>
Is the drum PG signal and drum FG signal present
on pins(66) and (65) of IC701, respectively?
Replace IC701.
Are the drum PG and drum FG signals present on
pins(7) and (8) of IC7002?
Check line between pins(7), (8) of IC7002 and all
the way up thru to pins(65), (66) of IC701.
Check periperal circuit of IC7002.
NO
NO
NO
YES
YES
YES
No head switching pulse.
D-FG
About 5Vp-p
D-PG
About 5Vp-p
49
DV-NC55S/H
DV-NC60H
DV-NC60H
FLOW CHART NO.12
Is there 14.3MHz oscillation at pins(37) and (38)
of IC701?
Check peripheral circuit of X701.
Is there drum FG signal at pin(65) of IC701 present?
Is the V-SYNC signal(reference) at pin(50) of IC701?
NO
YES
In PB mode
YES
In REC mode
Is the head switching pulse at pin(23) of IC701
present?
See FLOW CHART NO.11
<No head switching pulse>
NO
YES
NO
Is the drum APC output at pin(34) of IC701 and
drum AFC output at pin(32) of IC701 present?
Replace IC701.
NO
YES
Is the drum control voltage applied to pin(2) of
IC7002?
Is pin(58) of IC701 in high impedance?
NO
YES
Does the IC7002 operate normally?
YES
Replace drum motor.
YES
Drum servo does not function.
Check peripheral circuit of C746-747 and R745.
NO
Check drum FG signal line.
FLOW CHART NO.13
2
Only REC mode inoperative
YES
NO
NO
YES
YES
YES
NO
YES
NO
NO
YES
YES
YES
NO
NO
YES
NO
NO
YES
YES
NO
Are REC and/or PB mode inoperative?
Check peripheral circuit of X701.
1
Only PB mode inoperative
Does PB CTL signal appear at
pin(76) of IC701 (TP201)?
Does AA-MH harness normally?
Does A/C head operate normally?
Replace A/C head.
Check AC-MC connector and
capstan FG signal line.
Check capstan motor unit and/or
replace.
Is there capstan AFC and APC
at pins(31) and (33) of IC701?
Replace IC701.
Replace AA-MH harness.
Readjust the A/C head height.
Is there 14.3MHz oscillation at
pins(37) and (38) of IC701?
Does the capstan FG signal appear
at pin(67) of IC701?
Does pin(59) of IC701 operate
normally?
Check "
1
"
Check "2"
Replace IC701.
Is there REC CTL signal output at
pins(75) and (74) of IC701?
Is the V-SYNC signal(reference) at
pin(50) of IC701?
Check peripheral circuit of
C746-747 and R745.
Is there capstan AFC and APC
at pins(31) and (33) of IC701?
Capstan servo does not function.
FLOW CHART NO.14
NO
YES
YES
NO
YES
NO
YES
NO
YES
NO
NO
NO
NO
YES
YES
Is picture signal input into pins(30), (28) and (31)
of IC201?
Is picture signal output to the pin(52) of IC201?
Is picture signal input into the pin(49) of IC701?
Check the line between pin(52) of
IC201 and pin(49) of IC701.
Is 5V applied to the pin(12) of IC201?
Check the YC 5V line.
1
External input mode
•
Check the line between the front video input
terminal and pin(28) of IC201.
2
U/V tuner mode
Check the line between the pin(25) of U/V tuner
and pin(31) of IC201.
Is picture signal output to the pin(47) of IC701 ?
Is 5V applied to the pin(51) of IC701?
Check the AT 5V line.
Is picture signal output to the emitter of video
output buffer (Q708)?
Line output: Is there V-SYNC signal input at
pin(3) of IC2004.
Check the line between pins(63) and (62) of IC201
and pins(56) and (57) of IC701.
Check Q708 periphery.
NO
Check the line between the Q708 emitter and the
pin(3) of IC2004.
Is there V-SYNC signal output at pin(7) of IC2004.
YES
NO
Check the VIDEO OUT terminal (J1202) and the
line between the pin(7) of IC2004 and the VIDEO
OUT terminal (J1202).
YES
YES
Are the pin(1) of IC2004 on "L" level?
Replace IC2004.
NO
Check the DVD-H line.
NO
Is 5V applied to the pin(6) of IC2004.
Check the PC 5V line.
RF output: Check Q708 periphery and tuner pin(6)
periphery.
Is serial data clock signal applied to the pins(63)
and (62) of IC201?
Picture E-E does not appear.
50
DV-NC55S/H
DV-NC60H
DV-NC60H
FLOW CHART NO.15
NO
YES
YES
YES
NO
YES
YES
NO
YES
YES
YES
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
YES
NO
NO
Is luminance signal (approx. 0.5
Vp-p) input to the pin(19) of IC201?
Is luminance signal (approx. 0.3
Vp-p) input to the pin(42) of IC201?
Is luminance signal (approx. 0.5
Vp-p) input to the pin(26) of IC201?
Is luminance signal (approx. 0.5
Vp-p) input to the pin(23) of IC201?
Is the luminance signal (approx. 0.5
Vp-p) input and output to the pins(13)
and (14) of IC201, respectively?
SP mode: Is record FM signal (approx. 20 mp-p) output to the pins(88) and (89) (SP1) and pins(86) and (87) (SP2) of IC201?
LP mode: Is record FM signal (approx. 20 mp-p) output to the pins(93) and (94) (LP1) and pins(92) and (91) (LP2) of IC201?
Check or replace the cylinder.
Check the pins(13) and (14) of
IC201 peripheral circuit.
(R201, R202, C203, C225)
Is PRE/REC Vcc 5V applied to the pin(90) of IC201?
NO
Replace IC201.
Is chroma signal (approx. 197 mVp-p
/Burst) output to the pin(35) of
IC201?
Check between the pins(58) and
(35) of IC201.
Check whether the pins(75) and
(73) of IC201 oscillate (4.43 MHz)?
Check between the pins(60) and
(46) of IC201. (Check C512.)
Is chroma signal (approx. 156 mVp-p
/Burst) input into the pin(46) of
IC201?
Is chroma signal (approx. 197 mVp-p
/Burst) input into the pin(58) of
IC201?
SP mode: Is there chroma ingredient included signal (approx. 20 mVp-p)
output at pins (88), (89) ((SP1)) and pins (86), (87) ((SP2)) of IC201?
LP mode: Is there chroma ingredient included signal (approx. 20 mVp-p)
output at pins (93), (94) ((EP1)) and pins (92), (91) ((EP2)) of IC201?
Check between the pins(21) and
(42) of IC201. (Check C208.)
Check between the pins(39) and
(26) of IC201. (Check C212.)
Is luminance signal (approx. 0.5
Vp-p) input to the pin(39) of IC201?
Is voltage 5V applied to the CCD section
power terminal pin(36) of IC201?
Is CCD control voltage approx. 0V
applied normally to the pin(37)
from the pin(57) of IC201?
Is clock signal (approx. 8.86 MHz/
0.5 Vp-p) for CCD applied normally
to the pin(44) from the pin(69) of
IC201?
Is voltage 5V applied to the chroma
power terminal pin(61) of IC201?
Check the periphery of pin(61) of
IC201 and PC 5V line.
Check between the pins(18) and
(19) of IC201.
Check between the pins(24) and
(23) of IC201. (Check C210.)
Picture (luminance) record is impossible (E-E mode is possible).
Although picture record is possible, color does not appear (E-E mode is possible).
51
DV-NC55S/H
DV-NC60H
DV-NC60H
FLOW CHART NO.16
NO
NO
YES
YES
YES
NO
YES
YES
YES
YES
NO
NO
YES
YES
YES
YES
NO
NO
NO
YES
NO
YES
NO
YES
YES
NO
YES
NO
YES
NO
Is FM signal (approx. 200mVp-p)
input to the pin(78) of IC201?
Is the luminance signal input and
output to the pins(13), (14) of
IC201?
Is luminance signal (approx. 0.5
Vp-p) input to the pin(19) of IC201?
Is luminance signal (approx. 0.3
Vp-p) input to the pin(42) of IC201?
Is luminance signal (approx. 0.5
Vp-p) input to the pin(26) of IC201?
Is luminance signal (approx. 0.5
Vp-p) input to the pin(23) of IC201?
Is luminance signal (approx. 0.5
Vp-p) input at pin(52) of IC201?
Replace IC201.
Check between the pins(79) and
(78) of IC201.
Is luminance signal (approx. 200mVp-p
outputted at the pin(78) of IC201?
Is V-H.SW.P. applied to the pin
(81) of IC201?
Check V-H.SW.P. line.
Check the periphery of pins(13) and
(14) of IC201.
Check between the pin(18) and
pin(19) of IC201.
Check between the pin(21) and
pin(42) of IC201. (Check C208.)
Check between the pin(39) and
pin(26) of IC201. (Check C212.)
Is luminance signal (approx. 0.5
Vp-p) input to the pin(39) of IC201?
Is voltage 5V applied to the CCD section power terminal pin(36) of IC201?
Is control voltage approx. 5V applied normally to the pin(37) from the pin(57) of IC201? Is CCD clock signal
(approx. 8.86 MHz/0.5 Vp-p) applied to the pin(44) from the pin(69) of IC201?
Check between the pins(24) and (23) of IC201. (Check C210.)
Replace IC201.
Check between the pin(55) and
pin(54) of IC201.
Is chroma signal (approx. 300
mVp-p/Burst) input into the pin
(54) of IC201?
Is chroma signal (approx. 197
mVp-p/Burst) input into the pin
(58) of IC201?
Check between the pin(58) and
pin(35) of IC201.
Is chroma signal (approx. 197
mVp-p/Burst) output to the pin
(35) of IC201?
Check whether the pin(75) and pin
(73) of IC201 oscillate (4.43 MHz)?
Check between the pin(60) and
pin(46) of IC201. (Check C512.)
Check the periphery of pin(61) of
IC201 and PC 5V line.
Is voltage 5V applied to the chroma
power terminal pin(61) of IC201?
Is chroma signal (approx. 156
mVp-p/Burst) input into the pin
(46) of IC201?
Playback picture does not appear (E-E mode is possible).
Although picture is played back, color does not appear (E-E mode is pos
sible).
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